"Thirty-seven species of Ectoprocta representing 17 families are reported in the present collection from Scammon's Lagoon, Baja California, the first bryozoan collection reported from this region. Seventeen of the species had not previously been recorded from the Pacific coast of Baja California. One new species, Schizoporella occidentalae, is described. One new genus is erected, Alismittina, for Smittia californiensis Robertson, 1908, which has been rediscovered on the Pacific coast after having been unreported for more than 50 years. (Smittia is preoccupied.) The generic description of Hippopodinella Barroso, 1924, is emended to include: occasional small avicularia on the frontal or around the aperture. These are present on the type species of Lepralia adpressa Busk, 1854, now Hippopodinella adpressa. Rhynchozoon tumulosum has been synonymized under Rhynchozoon rostratum, and Holoporella quadrispinosa has been placed in synonymy with Holoporella brunnea. Clarification of the status of Hippoporella gorgonensis and Aimulosia uvulifera is undertaken. The distributional pattern of the species represented in the collection indicates that 48.6 per cent are tropical in occurrence, 37.1 per cent are also found in warm temperate waters, and 14.3 per cent also occur in cool temperate waters. Since many of the species are found in more than one zone, these figures should not be interpreted as indicating species that are restricted specifically to each area. This pattern is closely comparable to that of the ectoprocts found between Cabo San Lucas and Magdalena Bay on the west coast of Baja California, rather than to the assemblages immediately adjacent to Scammon's Lagoon"--P. 50.

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American Museum NovitatesNovitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.